IMPACT OF CYP3A5, CYP2C9, CYP2C19, AND CYP2D6 POLYMORPHISMS ON PHENAZEPAM SAFETY IN PATIENTS WITH ALCOHOL WITHDRAWAL SYNDROME

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Abstract

Introduction: Phenazepam is the Russian original benzodiazepine tranquilizer. We conducted first pharmacogenetic study on Phenazepam’s safety in patients with alcohol withdrawal syndrome. Isoenzymes CYP3A4, CYP3A5, CYP2C9, and CYP2C19 are involved into benzodiazepine tranquilizers’ metabolism.

Aim: To determine predictive value of CYP3A5, CYP2C9, CYP2C19, and CYP2D6 genetic polymorphisms and their haplotypes for adverse reaction risk associated with the treatment with phenazepam.

Materials and methods: The study enrolled 102 male patients with non-comlicated alcohol withdrawal syndrome (F10.3 by ICD-10) who entered the study group in 24 hours after the admission to hospital and was administered Phenazepam for 6 days. Therapy safety was evaluated with UKU Side Effects Rating Scale on the 6th day of treatment. 5 ml of venous blood was collected from each participant for genotyping to detect CYP3A5*3, CYP2С9*2, CYP2C9*3, CYP2C19*2, CYP2C19*3, CYP2C19*17, and CYP2D6*4 polymorphisms by real-time polymerase chain reaction. Haplotype analysis was performed by SNPStats online-tool. Statistical analysis was made in SPSS Statistics 21.0.

Results: In overall sample (n=102) CYP2C9*3 increased risk of «Increased duration of sleep» (OR 1.46; 95% CI 1.11−1.9; p=0.037) and «Constipation» (OR 13.1; 95% CI 1.44−119.2; p=0.02). The following results in subgroup «Phenazepam’s monotherapy» (n=64) were observed: CYP3A5*3 increased global severity of adverse drug reactions according to patient’s opinion (OR 2.79; 95% CI 1.26−6.22; p=0.031); CYP2C9*3 led to «Increased duration of sleep» (OR 1.57; 95% CI 1.14−2.17; p=0.034). Haplotype CYP3A5*3-CYP2C19*2-CYP2C19*17 (G-G-T) was associated with increased risk of «Concentration difficulties (OR 2.86; 95% CI 0.96−8.50; p=0.061).

Conclusion: The study findings confirmed that CYP2C9*3, CYP3A5*3, and CYP2C19*2 polymorphisms can decrease the phenazepam safety rate in patients with alcohol withdrawal syndrome. The result of haplotype analysis revealed that only CYP3A5*3-CYP2C19*2-CYP2C19*17 (G-G-T) can be used as a significant predictor of adverse reaction to phenazepam.

About the authors

D. V. Ivashchenko

Russian Medical Academy of Continuous Professional Education

Author for correspondence.
Email: dvi1991@yandex.ru
ORCID iD: 0000-0002-2295-7167

Dmitriy V. Ivashchenko – MD.

Moscow

Russian Federation

K. A. Ryzhikova

Russian Medical Academy of Continuous Professional Education

Email: kriistinkaa@mail.ru
ORCID iD: 0000-0003-3505-8520

KristinaA. Ryzhikova.

Moscow

Russian Federation

Zh. A. Sozaeva

Russian Medical Academy of Continuous Professional Education

Email: zhannet.sozaeva@gmail.com
ORCID iD: 0000-0001-5166-7903

ZhannetA. Sozaeva.

Moscow

Russian Federation

Y. A. Pimenova

Russian Medical Academy of Continuous Professional Education

Email: yulia.pimenova@bk.ru
ORCID iD: 0000-0002-9031-2272

Yulija V. Pimenova.

Moscow

Russian Federation

E. A. Grishina

Russian Medical Academy of Continuous Professional Education

Email: gelana2010@yandex.ru
ORCID iD: 0000-0002-5621-8266

Elena A. Grishina - PhD, Assistant professor.

Moscow

Russian Federation

M. S. Zastrozhin

Russian Medical Academy of Continuous Professional Education; Moscow Research Practical Center of Narcology

Email: rudnmed@yandex.ru
ORCID iD: 0000-0003-0607-4812

Mikhail S. Zastrozhin - MD, PhD.

Moscow

Russian Federation

A. D. Aguzarov

Moscow Research Practical Center of Narcology

Email: aguzarov.ad@yandex.ru
ORCID iD: 0000-0001-7664-998X

Albert D. Aguzarov – MD.

Moscow

Russian Federation

L. M. Savchenko

Russian Medical Academy of Continuous Professional Education

Email: uch_sovet@rmanpo.ru
ORCID iD: 0000-0002-2411-3494

Lyudmila M. Savchenko - MD, PhD, Professor.

Moscow

Russian Federation

E. A. Bryun

Russian Medical Academy of Continuous Professional Education; Moscow Research Practical Center of Narcology

Email: ea.bryun@yandex.ru
ORCID iD: 0000-0002-8366-9732

Eugeniy A. Bryun - MD, PhD, Professor.

Moscow

Russian Federation

D. A. Sychev

Russian Medical Academy of Continuous Professional Education

Email: dmytry.alex.sychev@gmail.com
ORCID iD: 0000-0002-4496-3680

Dmitriy A. Sychev - MD, PhD, Professor.

Moscow

Russian Federation

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